Colour Shadow Apparatus Optics Lab

Product Code : SCL-LAO-12081

Colour Shadow Apparatus Optics Lab (SKU SCL-LAO-12081) uses separately dimmable red, green and blue LEDs and a white screen to show additive colour mixing and the coloured shadows formed when one primary is blocked. It serves secondary-school, college and university optics and colour-theory lessons. Science Lab Supplies manufactures the apparatus in its own unit at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and supplies it directly to schools, colleges, tender contractors and distributors.

Specifications

All specifications of the RGB colour shadow unit appear in the rows below. In short, a ventilated polymer housing carries 630, 525 and 465 nm LEDs, each with its own rotary dimmer, runs from a 9 V DC adapter, and projects onto a detachable 250 x 200 mm matte white screen past three shadow pegs.

Applications and Experiments for the Colour Shadow Apparatus

With all three LEDs on, the screen turns white; a peg placed in the beams then throws shadows in cyan, magenta and yellow, because each blocks one primary. Turning the dials shifts the colours, making this engaging optics lab equipment for schools teaching light and colour.

• Class 8–10 light: additive mixing of red, green and blue into secondary colours and white.
• Complementary colour shadows, contrasted with subtractive mixing through a Color Filter Set.
• Recombining spectral colours, compared with the rotating Newton's Colour Disc.
• Lessons on colour vision, display screens and lighting design; younger pupils can start with the Educational Primary Colour kit.

Avoid staring into the LED apertures at close range during long sessions, and unplug the adapter after use.

Standard Scope of Supply

The apparatus is supplied with the main LED light source, a detachable matte white projection screen board, three geometric shadow-forming peg obstacles, a 9 V DC universal power adapter and a teacher lesson workbook with colour-tracking templates. It is ready to use from a standard mains socket.

Packing, MOQ and Lead Time

Quotations are prepared for any quantity, from one demonstration unit to a set for each lab group. Each states packing, delivery time and price for the number requested, and colour filters, colour discs or white screens can be quoted with it on the same document.

As a holder of an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Ethiopia, Tanzania, Uganda, the UAE, Saudi Arabia and Oman. Write to us from the contact page, combine several optics items in the enquiry cart, or look at the lab tender page when buying through a tender.

Frequently Asked Questions

How does it make coloured shadows from white light?
The three LEDs combine to give white on the screen. A peg blocks one colour path, so its shadow is lit only by the other two, producing cyan, magenta or yellow depending on which primary is blocked.

Can each colour be dimmed separately?
Yes. Three independent rotary dials give step-less control of the red, green and blue channels, so students can change the balance and watch the mixed colour and the shadows shift.

Does it need batteries?
No. It runs from the supplied 9 V DC adapter through a barrel jack. The LEDs sit in a ventilated polymer frame and run cool, and the screen is high-impact polymer rather than glass.

Does Science Lab Supplies manufacture this apparatus?
Yes. It is a Science Lab Supplies product, manufactured at the company's site in Saha, Ambala, India. Enquiries go to the same team that builds and packs it, so specifications and dispatch are confirmed at source.

Related Colour and Light Apparatus

These colour, filter and screen items extend lessons on mixing light, filtering wavelengths and perception, and fit naturally beside the colour shadow apparatus. Any of them can be added to the same quotation for a complete light and colour station.

• Optical Device for Color Demonstration. Color Disk — six LED bulbs and a 200 mm colour disc on a 120 x 120 mm base.
• Light Exploration Activity Kit — 3-way LED ray box with red, green, blue, cyan, magenta and yellow filters.
• Rectangular Optical Light Box — ray box whose filter tracks hold a red, green and blue filter set.
• Ray Box Optics Activity Set — 12 V ray box with sliding tracks for colour overlay sheets.
• Laboratory White Viewing Screen — 150 x 150 mm matte white steel screen with a 1 mm grid.
• Phenakistoscope Model Demonstrate — six double-sided animation discs giving 12 patterns.
• Polaroid Disc Mounted — 50 mm polarising discs in high-impact plastic rings.

Browse the full Light and Optics range, the Science Kit range for colour activity kits, or all physics lab equipment.

Last updated: 9 October 2026